Gas-engine.



No. 875,077. PATENTED DEC. 31, 1907. J. 11007517. GAS ENGINE.

APYLIOATION FILED FEB. 10, 1906.

3 SHEETS-SHEET 1.

WITNESSES I I INVENT ATTORNEYS {1%. 875,077. PATENTED DEC. 31, 1907. J.HOOVER. GAS ENGINE.

APPLICATION I'ILBD FEB. 10, 1906.

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WlTNESSES Y INVENTOR ATTORNEYS PATENTED DEC. 31, 1907.

J. B. HOOVER.

GAS ENGINE.

APPLICATION TILED FEB. 10, 1906.

3 SHEBTSSHEET 3.

INVENTOR WITNESSES ATTORNEYS JACOB B. Hooves, OF COLUMBUS, oruo.

GAS-ENGINE.

Specification of Letters Patent.

Patented 11393.31, 1907.

Application filed February 10. 1906- Berle-1H0. 300.360,

To all whom it may concern:

Be it known that I, JACOB citizen of the United States, residing 'at C0-lumbus, in the county of Franklin and State of- Ohio, have inventedcertain new and useful Im rovements in Gas-Engines, ofwhich the folowing is a specification.

My invention relates to new and useful improvements in gas engines andmore particularly to two cycle air cooled gas engines.

The object of the invention is to provide an engine of the characterdescribed comprising one or more cylinders, each constructed so as to becooled to the'proper degree. In carrying out this feature, peculiarlyormed projections are provided on each cy inder and act in consequenceof their par- ;tkzplar formation, to 'efiectually cool the cylin er.

Another feature resides in the provision ofthe invention consists of thenovel details of construction and operation, a preferable embodiment ofwhich is described in the specification and illustrated in theaccompanying drawings, wherein Figure 1 is an elevation of one of thecylinders, a portion of the casing being broken away to show the diamondshaped studs, Fig. 2 is a vertical sectional view, Fig.3 is a horizontalsectional view taken .on the line as w of Fig. 2, and, Bi 4 is a sideelevation of two cylinders embo ying my invention and connected by anair conductor.

In the drawings the numeral 1 desi nates the cylinder and 2 the usualpistonhea At one side the cylinder is formed with an enlargement 3through which a vertical passage 4, shown in dotted lines in Fig. 2,extends. This passage terminates at its upper end in a chamber 5 formedby a boss 6 provided on the side of the cylinder, the said boss thusreceiving a plate 7, which is removably secured thereto by screw bolts8. The passage 4 is provided for conducting the charge to the cylinder,which charge enters the chamber and passes from the same into thecylinder B. Hooves,

through a double port 9 and about each side of a bridge 10, the latterbeing provided to strengthen-the cylinder at this'point, as will beapparent. By means of the removable plate 7 access may be readily had tothe chamber 5, the port 9 and the passage 4.

- By observing Fig. 2, it will be seen that the iston at the lower endof its downward stro e, just clears the double inlet port 9 so as toermit the charge to, freely enter the "c lin er. On the iston head theusual eflector 11 is posit oned so as to stand in front of the inletport 9 and direct the charge upward. At its upper end the cylinder ispro vided 'with a suitable sparking plug 12, the,

a'fter described. @n the upper portion oil the sides of the cylinder, Iform a plurality of staggered diamond shaped projections or coolingstuds 14:. These studs are produced preferably by milling out thesurface of the cylinder, so that their edges ,may beground s arp andtheir extreme ends made extremely thin. By such a procedure a muchbetter cooling actionmay be had, for the reason that the heat from thecylinder will be drawn to the thin edges and rapidly cooled. In carryingout the cooling operation, I provide a cylindrical casing 15 which fitssnugly about the said studs and extends a short distance above the headof the cylinder. At its upper end the casing is provlded with an opening16 which is covered and admits air from a conductor 17. The air thusadmitted is forced downward and caused by the casing 15 to pass in andabout the sides of the studs,

thereby coming in direct contact. with the sharp edges of the same, withthe effect that.

a perfect cooli action is had. I have found that even etter results areobtained where the studs and the cylinder are coated with cop or.

The cy inder 1 is provided op osite the 111- let port 9 with a boss 18,in w ich exhaust passages 19 merging together about. a verity ofshortvertical blades 13 are arranged for the pur ose of cooling, as will beherein-v exhaust assagesmeet and escape throught e exhaust ipe 23. Forthe urpose of cooling thee aust and particu arly that part of thecylinder adjacent the exhaust' passages, the casing'15 is bulgedoutwardly near its lower end as indicated at 24, the extreme lower edgeof the said bulged portion being bent inward and fitting. snugly aboutthe cylinder asfindicated in the- 10 drawings. This lower edge of thecasing is securely fastened so as tohold it in position and preventleakage. The bulged portion 24 is flared and inclined from the inletside to the exhaust side and merges into a tube 25, which latter" isalso partially formed by a continuation of the casing 15. This pipe 25surrounds the'exhaust pipe 23' and t e boss 18'engaging with theunderside of the'latter. From the foregoing it. would be apparent thatthe air forced into thecasing 15 after passing down and about the studs14 passes into the tube 25 and at the same time also passes through thepassages 21, thus cooling the exhaust ports and pipe to the roperdegree. The air isconveyed through the pipe 25 to a suitable outlet.

It is to .be noted that the plate 22 is removably secured, dpermittingthe exhaust pipe 23 to be easilyisconnected and access to the exhaustpassages 19 and'their parts there-' about, easily had. By observingFigs. 2 and 3, it will be seen that the air forced downthrough thecasin'g'is permitted to. freely circulate'in and about the exhaust boss18 and the liability of the same becoming overheated, is reduced to aminimum.

It is to be understood 'that any number of cylinders desirable may beused and in Fig.

A, I have shown two cylinders connected with the conductor 17 passingacross the tops of their casings. This conductor is carried down andconnected with a suitable fan or the like, which forces air through theconductor to the casings. When two or more of the cylinders areconnected, the tubes 25 "are let into a common air conductingl tube 26 ecylinwhich extends along the sides of t ers.. Y i

What-I claim, is

1. The combination with the cylinder of an explosive engine, of aplurality of diamond shaped projections formed upon the exterior face ofthe cylinder, a casing surrounding'the cylinder and in contact with theprojections, means for conducting air to one end of said casing, meansfor conducting air from the other end of said casing, and an exhaustpipe leading. from the engine, the last named air conducting meanssurrounding said exhaust pi e.

2. In a device 0 the character described, I the combination with thecylinder of an ex plosive engine, of a pluralit V of diamond said casingbeing bulged outwardly cylinder, and an air conduit leading from thebulgin portion of the casing whi h Sup rounds said exhaust pipe. K

. In testimony whereof I afiix my signature in presence of twowitnesses.

Witnesses A. L. PnELrs, M. Bi SOHLEY.

JACOB B. HOOVER.

